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2 years ago

Use substitution to solve the system of equations.

1 answer:

3 0

(3.75, 5.5)

(Work is attached )
When using substitution , you substitute with a variable that is already by itself. In this case, the variable “y” is already by itself and equal to x+ 1.75 . you substitute that for the the y in the other equation and solve for the other variable which is “x”. After you solve for x , to find your y value, you have to substitute the x value in for either equation.

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I will give brainiest to whoever answers correctly !!

KonstantinChe [14]

Answer:

The number of units sold increased by $\mathbf{11.2\%}$

Step-by-step explanation:

Vacuum dealer sold units in 2011 = 420

Vacuum dealer sold units in 2012 = 467

We need to find percent increase or decrease

Since, In 2012 units sold are greater than 2011, so there will be percent increase.

The formula used is: $Percent\:Increase=\frac{New\:Value-Original\:Value}{Original\:Value}\times 100$

We have New Value (Units sold in 2012) = 467

Original Value (Units sold in 2011) = 420

Percent increase is:

$Percent\:Increase=\frac{New\:Value-Original\:Value}{Original\:Value}\times 100\\Percent\:Increase=\frac{467-420}{420}\times 100\\Percent\:Increase=\frac{47}{420}\times 100\\Percent\:Increase=11.2\%$

So, The number of units sold increased by $\mathbf{11.2\%}$

4 0

3 years ago

The table shows the heights of 40 students in a class.

Darya [45]

Answer

A. 129.3

B. The students ages can be any number within the ranges, so having the middle number wont represent the other possible heights.

Step by step

'h' is the number between the surrounding number, the first would be 122.

You need to multiply the hight by frequency of each one,

122x7 =854

126x8=1008

130x13=1690

134x9=1206

138x3=414

Add them up = 5172

5172/40 =129.3

4 0

2 years ago

Can someone help me out please??

Georgia [21]

I’m pretty sure the answer is that last one where t is less than or equal to -12

6 0

3 years ago

Read 2 more answers

With the spinner shown, the theoretical probability of landing on 2 is 0.25. Which number of spins would most likely result in a

Mice21 [21]

just give the other kid brainiest

Step-by-step explanation:

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3 years ago

John has a containing 24 2/3 feet of wrapping paper. he wants to divide it into 11 pieces first though he must cut off 5/6 foot

navik [9.2K]

Each piece would be 13/4 or 2.1666666(feet)

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3 years ago